Hydroquinone → HCID 22103871, compound

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Reaction Steps

The above U.S. Pat. No. 3,036,991 discloses in Example 1 that polymers having a melting point of 360° to 370° C. are obtained by polycondensation of a mixture containing 0.04 mole of hydroquinone, 0.01 mole of 4,4'-dihydroxybiphenyl and 0.05 mole of isophthaloyl chloride in pentachlorobiphenyls. This patent also discloses in Example 2 that polymers having a melting point of 388° to 394° C., 362° to 379° C., 355° to 372° C. and 355° to 374° C., respectively, are obtained by a similar acid chloride method when the hydroquinone/4,4'-dihydroxybiphenyl molar ratio is 90/10, 80/20, 70/30 and 60/40. Further, in Example 3, it discloses a method of polycondensation of p-phenylene diacetate (0.082 mole), 4,4'-diacetoxybiphenyl (0.020 mole) and isophthalic acid (0.100 mole) in trichlorobiphenyls.

Provenance & Evidence